Title :
The origin of the Pb-rich Bi3Sr2Ca2Cu1Ox (3221) phase during post annealing of (Bi,Pb)2Sr2Ca2Cu3Ox/Ag composite conductors
Author :
Yuan, Y. ; Cai, X.Y. ; Jiang, J. ; Huang, Y. ; Larbalestier, D.C. ; Hellstrom, E.E.
Author_Institution :
Appl. Supercond. Center, Univ. of Wisconsin-Madison, Madison, WI, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
We studied the origin of (Bi,Pb)3Sr2Ca2Cu1Ox (3221) in (Bi,Pb)2Sr2Ca2Cu3Ox-based (2223) wires by varying the amount of 2223 and remnant liquid in wires using slow-cooling and quenching experiments on 2223 green wires. The 3221 phase forms from crystallization of remnant liquid.
Keywords :
aluminium; annealing; bismuth compounds; calcium compounds; cold working; cooling; crystallisation; gas mixtures; high-temperature superconductors; lead compounds; multifilamentary superconductors; nitrogen; oxygen; strontium compounds; type II superconductors; (BiPb)2Sr2Ca2Cu3Ox-Ag; 2223 green wires; 3221 phase; crystallization; multifilamentary wires; post annealing; quenching experiments; remnant liquid; slow cooling; Annealing; Conductors; Cooling; Crystallization; Electromagnetic heating; Heat treatment; Microstructure; Superconducting filaments and wires; Superconductivity; Temperature; 2223; 3221; Critical current; phase formation; post anneal;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.847518